Controller - A device which forms part of a control system – often taking the error between the desired state and the actual state and generating data used to affect an actuator.
Force Feedback - A method whereby a sensor conveys to the user the force felt when touching an object.
Fuzzy Logic - A form of logic which deals with approximate values, as opposed to logic signals which are true or false only.
Error - In a control system, the difference between the desired state and the actual state.
Excitatory - connection between neurons which enhances action (as used in Neural Networks and Braitenberg vehicles).
Feedback - The process of returning information about the output of a system.
Feedback Loop - A circular path along which information is passed.
Assembly robot - A robot used typically in a production line manufacturing (e.g. cars).
Autonomous robot - A robot which works on its own, as opposed to being controlled by a human.
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Proportional Control - A strategy where the controller outputs a value which is the error multiplied by a constant (is proportional to the error).
Touch sensor - A sensor which measures some aspect of the physical contact with an object.
Vision Sensor - A device which gives a visual representation of something – typically from a camera.
Integral control - A method used in Feedback Control where the output of the controller depends on its input (typically the error) and previous values of its output.
Gain - The size of the output of an element divided by its input – in a Proportional Controller, its output is the error * the gain.
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